package jdbc_code;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

public class jdbcDemo1 {

    public static void main(String[] args) throws Exception {

        //1.导入驱动jar包
        //2.注册驱动
        Class.forName("com.mysql.cj.jdbc.Driver");
        //3.获取数据库连接对象
        Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/db1?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC", "root", "qwe123");
        //4.定义一个sql语句
        String sql = "update student set age = 20 where id = 1";
        //5.获取执行sql的对象
        Statement stmt = conn.createStatement();
        //6.执行sql
        int i = stmt.executeUpdate(sql);
        //7.处理结果
        System.out.println(i);
        //8.释放资源
        stmt.close();
        stmt.close();
    }
}
